Sofa



FIG. 1 is a perspective view of a sofa showing my new invention,

FIG. 2 is a view in front elevation thereof,

FIG. 3 is a view in end elevation thereof, and

FIG. 4 is a top plan view thereof.

The end of the sofa not shown is a mirror image of the side shown. 

The ornamental design for a sofa, as shown and described. 